1121002001 has 4 divisors (see below), whose sum is σ = 1281145152. Its totient is φ = 960858852.

The previous prime is 1121001907. The next prime is 1121002039. The reversal of 1121002001 is 1002001211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1121002001 - 2¹⁰ = 1121000977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121002001.

It is not an unprimeable number, because it can be changed into a prime (1121001001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80071565 + ... + 80071578.

It is an arithmetic number, because the mean of its divisors is an integer number (320286288).

Almost surely, 2^1121002001 is an apocalyptic number.

It is an amenable number.

1121002001 is a deficient number, since it is larger than the sum of its proper divisors (160143151).

1121002001 is an equidigital number, since it uses as much as digits as its factorization.

1121002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160143150.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1121002001 is about 33481.3679678713. The cubic root of 1121002001 is about 1038.8084235534.

Adding to 1121002001 its reverse (1002001211), we get a palindrome (2123003212).

The spelling of 1121002001 in words is "one billion, one hundred twenty-one million, two thousand, one".